Threader block for carbon



April 21, 1931.

C. L. KELLY ET AL THHEADER BLOCK FOR CARBON Filed Sept. 20, 1929 v vary Patented Apr. 2l, 1931 UNITED STATES PATENT OFFICE CHARLES L. KELLY A ND STANLEY F. ELLSWORTH, OF CHICAGO, ILLINOIS THLREAJJER BLOCK FOR CARBON Application filed September 20, 1929. Serial No. 393,877.

This invention relates to threader blocks and more in particular to the provision of a novel construction of means for holding carbon paper or the like in alignment and to facilitate the insertion of a threading strip in aligned openings in the paper and in a holder therefor. In prior constructions of carbon paper holders, the carbon paper was secured to the backing strip and no provision was made for detaching the carbon sheets or for-adding or subtracting therefrom. The holder thus became a permanent construction and when the carbon sheets were no longer of use, or when the attaching means had been broken, the entire holder was necessarily discarded.

The subject matter of the present invention relates to a threading block which is particularl adapted for use with a `carbon paper hol er of the ty e disclosed in the application of Charles Kelly, Serial No. 239,887 although it is of course to be understood that the use of the present invention is not limited to such carbon paper or holder alone, but to numerous other uses which may be inherent.

Among the objects of our invention are to provide a threading block adapted to expedite the assembly and retention of carbon sheets or the like in a holder in which they are adapted to be placed, the present invention providin a mounting for the backing sheet and car on.

A further object of the invention is to provide a novel construction of threading block adapted to hold in registry a plurality of carbon sheets or the like which are provided with aligned openings.

A still further object is to rovide a threading block provided with a p urality of upstanding tongues adapted to intercept a holder and carbon paper or the like therefor and to permit the ready insertion of a threading strip, such block assisting and guiding the threading strip into its retaining position.

Further objects are to provide a novel construction of maximum simplicity, einciency, economy and ease of assembly and operation; and such further objects, advantages and capabilities as will later more fully appear and are inherently possessed thereby.

Our invention further resides in the combination, construction and arrangement of parts illustrated in the accompanying drawings, and while we have shown therein a preferred embodiment, it is to be understood that the same is susceptible of modification and change, without departing from the spirit of our invention.

In the drawings:

Fig. l is a plan view of the threading block.

Fig` 2 is a view in side elevation of the threading block and disclosing the carbon paper holder and carbon paper in position thereon.

Fig. 3 is a view in vertical cross section through the threading block and taken on the line 3 3 of Fig. 1, the carbon paper 70 holder being shown as mounted upon the threading block and the threading strip having been passed through the central openings in the holder and carbon paper.

Fig. 4 is a view similar to Fig. 3, but dis- 75 closing the threading strip having been passed through the aligned openings in the carbon paper holder and a er.

Fig. 5 is a view in end) e evation of the carbon paper holder and threading strip in assembled relation.

Fig. 6 is a fragmentary top plan view of the upper edge of the carbon paper holder, and disclosing the threading strip in position.

Referrin moreparticularly to the disclosure in t e drawings, the numeral 1 refers generally to the threading block. This threading block is shown as comprising a Substantially triangular base member 2 con- 90 structed of Wood or the like, and provided with a longitudinally extending central groove or channel 3 in which is positioned a threading member 4 having a central raised portion 5 and upstanding tongues 0r pro- 95 )ections 6 at the ends thereof. The central raised ortion is mounted upon a block 7 which in turn is attached in any suitable manner in the base of the longitudinal groove or channel 3 of the member 2.

In the assembly of the carbon paper holder 8 of the type disclosed, and consisting of a backing sheet 9, a top strip 10 and intermediate sheets of carbon paper or the like 11, all of which are provided with aligned openings 12, the backing sheet is first placed over the threading block with the outer openings in registry with the upstanding tongues 6. The carbon paper 11 is next placed in similar position with its outer openings also in registry with the upstanding tongues 6 of thel threaded block. Next the top strip 10 is placed' in position.

Although I have described these members as being placed in position in sequence, it is of course to be understood that the backing strip, carbon paper and top strip may be placed in aligned relation and then the entire assemblage placed over the upstanding tongues 6. A threading strip 13 is then forced down through the central openings and by reason of the curvature of the strip or threading member 1, the ends of the threading strip 13 will pass beneath the paper assemblage and follow the contour of the member 4, and then pass through the outer holes 12 alongside the upstanding tongues G. The strip 13 is then drawn rather tightly into the position shown in Figs. 5 and 6, so as to provide a compact and substantially flat assembl Y.

As disclosed more clearly in Fig. G, the ends 14 of the threading strip 13 are tapered so as to expedite their passing through the openings in the backing sheet, carbon and top strip of the holder. This strip 13 is constructed of some flexible material, but which at the same time possesses sufficient rigidity to revent bucklin thereof when the same is eing threaded into the holder. Ve have found that celluloid or the like is Well adapted for the construction of the threading strip, as Well as for the backing sheet and top strip, although it is to be understood that any suitable material may be used. A pad 15 of felt or the like, is attached to the base of the holder so as to prevent damage to a desk or'otherrfurniture or equipment upon which the holder may be positioned.

From the above description and the disclosure in the drawings, it will be readily seen that We have rovided a threading block `which is very efheient in operation and which comprises a minimum number of parts.

Having thus disclosed our invention`r we claim:

l. A threading block for carbon aper holders adapted to hold a quantity oi7 carbon, comprising a base, means for intercept4 ing openings in said h older and carbon, and means for directing and guiding :i threading strip through said openings.

:5. A threading block for carbon paper holders, comprising a grooved block, and

means in the groove for directing a threading strip or tape through openings in said carbon paper holder.

3. A threading block for carbon paper holders adapted to hold a quantity of carbon, comprising a block provided With a lon itudinal groove, and means mounted in said groove for directing and guiding a threading strip through aligned openings in said holder and carbon paper.

4. A threading block for carbon aper holders adapted to hold a quantity o carbon, comprising a threading member provided with upstanding tongues adapted to intercept certain aligned openings in said holder and carbon, said member being further provided with means for directing and guiding a threading strip through said openings for assembly of said holder and carbon.

5. A threading block for the assembly of carbon paper holders adapted to hold a quantity of carbon provided with aligned openings, comprising a base and a threading member provided with a central raised portion and an upstanding Harige at each end thereof, said anges bein adapted to receive the aligned holder an carbon and hold the same in registry for the rece tion of a threading strlp, said member eing adapted to direct and guide said strip through the openings for the assembly of the holder and carbon.

6. A threading device for sheets of carbon paper having aligned openings, comprising a. block, and means secured to said block, for engaging said ali ned openings `for temporarily holding said sheets, said means having parts for directing a threading strip through said openings for holding said sheets of carbon paper together.

7. A threading device for sheets of carbon paper having aligned openings, comprising a block, a threading member secured to said block, said member having curved portions for guiding a threading strip through said opening for holding said papers in assembled relation.

8. A threading device for sheets of carbon paper having aligned o enings, comprising a threading member aving upstanding ends for engaging said openlngs for temporarily holding said sheets, the inter-section of said end and body part of said member being curved for guiding a threading strip along said member and through said openings.

9. In a threading device for carbon papers, a threading member, said member having upwardly extending ends, and raised portions therebetween, said ends and raised portions having guiding surfaces.

10. A threading device for carbon papers, comprising a grooved block, and a threading member secured in said groove, said member having upwardly extending end portions, and raised ortions between said ends, said ortions eing provided with guidin sur aces.

11. n a threading device for carbon papers, a threading member, said member having upwardly extending end portions, and a central raised portion.

12. A threading device for carbon papers, comprising a grooved block, and a threading member in said groove, said member having upwardly extending ends, and a central raised portion between said ends, said ends and raised portion having guiding surfaces.

In witness whereof, We hereunto subscribe our names to this specification.

CHARLES L. KELLY. STANLEY F. ELLSWORTH.

ing member secured in said groove, said member having upwardl;r extending end portions, and raised ortions between said ends, said ortions eing provided with 5 guidin sur aces.

11. n a threading device for carbon papers, a threading member, said member having upwardl)I extending end portions, and a central raised portion.

l0 12. A threading device for carbon papers,

comprising a grooved block, and a threading member in said groove, said member having upwardly extending ends, and a central raised portion between said ends,

l5 said ends and raised portion having guiding surfaces.

In witness whereof, we hereunto subscribe our names to this specification.

CHARLES L. KELLY. 20 STANLEY F. ELLSWORTH.

CERTIFICATE 0F CORRECTION.

Patent No. 1,802,115. Granted April 21, 1931, to

CHARLES L. KELLY ET AL,

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 9, end of claim 1l, before the period insert a comma and the words "said portions being provided with guiding surfaces; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this lst day of September, A. D. 1931.

M. J. Moore, (Sell) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. 1,802,115. Granted April 21, 193i, to

CHARLES L. KELLY ET AL.

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 9, 'end of claim 11, before the period insert a comma and the words "said portions being provided with guiding surfaces; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of September, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

